CN113699791B - Soft antibacterial non-woven fabric and preparation method thereof - Google Patents
Soft antibacterial non-woven fabric and preparation method thereof Download PDFInfo
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- CN113699791B CN113699791B CN202111004200.0A CN202111004200A CN113699791B CN 113699791 B CN113699791 B CN 113699791B CN 202111004200 A CN202111004200 A CN 202111004200A CN 113699791 B CN113699791 B CN 113699791B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
- D01F11/06—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/08—Organic compounds
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- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
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- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The invention belongs to the technical field of textile fabrics, and particularly relates to a soft antibacterial non-woven fabric and a preparation method thereof. The product developed by the invention comprises non-woven fabric fibers, citric acid and antibacterial metal ions; the antibacterial metal ions are chelated and adsorbed by citric acid; the non-woven fabric fibers are porous non-woven fabric fibers, and the pores of the porous non-woven fabric fibers are of a through hole structure, so that the citric acid is distributed in the pores and can be in contact with the outside. In addition, a polydopamine interlayer is filled between the pores and the citric acid; and 4, the non-woven fabric fibers comprise the non-woven fabric fibers with different sizes in parts by weight as follows: 20-40 parts of the material with the length of 3-5cm and the length-diameter ratio of 20:1-30: 1# nonwoven fiber of 1; 30-40 parts of the material has a length of 300-500 mu m and an aspect ratio of 10:1-15: 1# 2 nonwoven fabric fiber; and thermoplastic elastomer TPE with 3-5% of the fiber mass of the non-woven fabric.
Description
Technical Field
The invention belongs to the technical field of textile fabrics. More particularly, to a soft antibacterial non-woven fabric and a preparation method thereof.
Background
The development of antibacterial and antiviral non-woven fabrics and chemical fiber products meets the requirement of consumers on continuously improving the product performance, and simultaneously is the requirement of enterprises on obtaining higher product added value, improving the product competitiveness and expanding the market space.
The core component in the antibacterial material is an antibacterial agent. Anti-seedling agents can be broadly classified into inorganic, organic and natural three categories according to chemical composition. Natural and organic antibacterial agents belong to chemical sterilization methods, and inorganic antibacterial agents belong to physical sterilization methods. The organic antibacterial agent has the advantages of high sterilization speed, wide antibacterial range and the like, but also has the problems of poor heat resistance, easy exudation, toxic dissolved matters, washing intolerance, short service life, easy drug resistance generation and the like. The inorganic antibacterial agent has better safety, heat resistance and durability, has the defects of higher price and antibacterial slow effect, can not kill bacteria as quickly as the organic antibacterial agent, and has little inhibition effect on fungi and moulds. In addition, the inorganic antibacterial powder has poor compatibility with high polymer materials, is easy to agglomerate in matrix resin, and can bring great difficulty to spinning, film drawing and the like of the materials. Antimicrobial agents can be categorized into soluble and non-soluble forms in terms of release form, with each having advantages. The molecular assembly antibacterial technology combines the advantages of the two, has high-efficiency broad-spectrum antibacterial activity, is safe and nontoxic to human bodies, and has long-acting antibacterial functional groups, and the antibacterial functional groups are assembled on the molecular chain of matrix resin through chemical reaction, so that the antibacterial master batch is obtained, and can be conveniently applied to the production fields of non-woven fabrics, chemical fibers and the like.
The cell membrane or cell wall of bacteria and fungi generally contains negatively charged proteins, and the assembled antibacterial functional group is positively charged, so that the assembled antibacterial functional group is adsorbed to microbial cells due to the action of coulomb force and influences the normal respiration and metabolism functions of the cells; or the cell membrane (wall) is broken, and the content flows out, so that microorganisms are killed, and the aim of resisting bacteria is fulfilled. Because the charge environment is the basis for the growth and propagation of bacteria and fungi, and just like air and water are on the human body, the bacteria and fungi die due to the lack of the environment, which is why the split-assembly antimicrobial technology has broad-spectrum antimicrobial performance. However, the physical effect of the charge has no influence on the human body, thereby ensuring the use safety. Furthermore, the antibacterial functional group is connected with the matrix polymer material through a chemical bond, so that the use safety is further ensured, and the long-acting property of the antibacterial effect is also ensured.
However, the antibacterial functional group is easy to adsorb with bacterial cells or dust impurities in the external environment in the actual use process, so that a passivation layer is formed on the surface layer, an effective killing effect on bacteria in the environment cannot be achieved, frequent cleaning is needed to maintain the sterilizing effect, and the wide use of products is affected.
Disclosure of Invention
The invention aims to overcome the defects that the surface of the traditional antibacterial non-woven fabric is easy to adsorb bacterial cells or impurities in the external environment in the actual use process, so that a passivation layer is formed on the surface, and the effective killing effect on bacteria in the environment cannot be achieved.
The invention aims to provide a soft antibacterial non-woven fabric.
The invention also aims to provide a preparation method of the soft antibacterial non-woven fabric.
The above object of the present invention is achieved by the following technical scheme:
a soft antibacterial non-woven fabric comprises non-woven fabric fiber, citric acid and antibacterial metal ions;
the antibacterial metal ions are chelated and adsorbed by citric acid;
the non-woven fabric fibers are porous non-woven fabric fibers, and the pores of the porous non-woven fabric fibers are of a through hole structure, so that the citric acid is distributed in the pores and can be in contact with the outside.
According to the technical scheme, citric acid which is chelated and adsorbed with antibacterial metal ions is introduced into non-woven fabric fibers, and the citric acid is taken as an indispensable raw material in the tricarboxylic acid cycle in the respiration process of microorganisms and participates in the respiration cycle of bacteria;
firstly, citric acid has a certain weak antibacterial effect, once bacteria are adsorbed on the surface of the non-woven fabric, the citric acid adsorbed in the non-woven fabric is absorbed by the bacteria and participates in bacterial tricarboxylic acid circulation, so that the citric acid in the non-woven fabric is consumed, after the citric acid is consumed, metal ions with antibacterial effect chelated by the citric acid are released, thereby the sterilizing effect is exerted, and in the tricarboxylic acid circulation process, new citric acid is generated along with the consumption of the citric acid, the adsorption sites of bacterial thalli on the surface of the non-woven fabric are changed along with the consumption and the circulation regeneration of the citric acid, the dead thalli fall off from the surface of the non-woven fabric due to the change of the adsorption sites and the lack of the biological activity, and the newly generated citric acid is continuously used as an active component to fix the metal ions with the antibacterial effect on the surface of the non-woven fabric.
Preferably, the antimicrobial metal ion is selected from at least one of silver ion, copper ion or zinc ion.
Preferably, a polydopamine interlayer is filled between the pores and the citric acid.
According to the technical scheme, the polydopamine layer is further introduced, and the polydopamine layer is utilized to treat pore channels of the non-woven fabric fibers, so that the adsorption and fixation effects of non-woven fabric pores on citric acid are improved, and the excessive quick loss of citric acid in the preparation, storage and use processes of the product is avoided.
Preferably, the non-woven fabric fibers comprise the following non-woven fabric fibers with different sizes in parts by weight:
20-40 parts of the material with the length of 3-5cm and the length-diameter ratio of 20:1-30: 1# nonwoven fiber of 1;
30-40 parts of the material has a length of 300-500 mu m and an aspect ratio of 10:1-15: 1# 2 nonwoven fabric.
According to the technical scheme, the non-woven fabrics with different specifications are compounded, so that under the condition of the addition amount of the same quality, the fibers with relatively smaller specifications can obtain larger stacking density, and the antibacterial non-woven fabrics can obtain relatively compact antibacterial layers; in addition, as the non-woven fabric is formed by unordered accumulation of fibers, the long fibers can ensure the softness and mechanical property of the product, and after the long fibers and the short fibers are staggered, the short fibers are filled in gaps among the long fibers, so that the surface flatness of the non-woven fabric can be improved, and dust accumulation is reduced.
Preferably, the thermoplastic elastomer TPE with the mass of 3-5% of the non-woven fabric fiber is also included.
A preparation method of soft antibacterial non-woven fabric comprises the following specific preparation steps:
preparation of porous non-woven fabric fibers:
mixing nano calcium carbonate and polypropylene slices, and extruding in a screw extruder to obtain blended fibers; soaking the blended fiber in hydrochloric acid solution, carrying out ultrasonic soaking, filtering, washing and drying to obtain porous non-woven fabric fiber;
modifying porous non-woven fabric fiber:
soaking the porous non-woven fabric fibers in a dopamine solution, regulating the pH value of the solution to 7.2-7.5, introducing air into the solution, taking out the porous non-woven fabric fibers after ultrasonic soaking reaction, and drying to obtain pretreated porous non-woven fabric fibers;
mixing and dissolving citric acid and an antibacterial metal salt solution, adding pretreated porous non-woven fabric fibers, carrying out ultrasonic impregnation, filtering, and drying to obtain the modified porous non-woven fabric fibers.
Preferably, the antibacterial metal salt is selected from at least one of silver nitrate, copper sulfate, copper chloride, copper nitrate, zinc sulfate, zinc chloride, zinc nitrate.
Preferably, the specific preparation steps further comprise: in the preparation process of the non-woven fabric fiber, when the nano calcium carbonate and the polypropylene slices are mixed, the thermoplastic elastomer TPE with the mass of 3-5% of the mass of the polypropylene slices is added.
According to the technical scheme, the thermoplastic elastomer is further added in the preparation process of the product, on one hand, when the product is prepared, along with water molecules entering the thermoplastic elastomer, the elastomer is caused to expand to a certain extent, so that the porous non-woven fabric fiber pores shrink, after the porous non-woven fabric fiber is dried, the volume of the elastomer shrinks, a certain channel is reserved in the pores, the moisture absorption and air permeability of the non-woven fabric are guaranteed, good moisture absorption and air permeability are achieved, the inside and outside of the non-woven fabric have good mass transfer processes, the transfer of antibacterial components is facilitated, and the antibacterial durability of the product can be improved to a certain extent.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are not intended to limit the invention in any way. Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art.
Reagents and materials used in the following examples are commercially available unless otherwise specified.
Example 1
Preparation of porous non-woven fabric fibers:
according to the weight portion, sequentially taking 5 portions of nano calcium carbonate, 120 portions of polypropylene slices and thermoplastic elastomer TPE with the mass of 3% of the polypropylene slices, adding the mixture into a mixer, stirring and mixing the mixture, pouring the mixture into a screw extruder for base, molding, and sieving the mixture to obtain the thermoplastic elastomer TPE with the length distribution of 3-5cm and the length-diameter ratio distribution of 20:1-30: 1# nonwoven fiber of 1, and a length distribution of 300 to 500 μm, an aspect ratio distribution of 10:1-15:1, according to parts by weight, taking 20 parts of 1# non-woven fabric fibers and 30 parts of 2# non-woven fabric fibers for compounding to obtain blended fibers;
soaking the blended fiber in 3% hydrochloric acid solution by mass fraction, carrying out ultrasonic soaking for 60min under the condition of ultrasonic frequency of 60kHz, filtering, collecting a filter cake, washing the filter cake with deionized water for 3 times, transferring the washed filter cake into an oven, and drying to constant weight under the condition of 55 ℃ to obtain porous non-woven fabric fiber;
modifying porous non-woven fabric fiber:
soaking the porous non-woven fabric fibers in a dopamine solution with the concentration of 2g/L, regulating the pH value of the solution to 7.2, introducing air into the solution at the rate of 30mL/min for 10min, continuously carrying out ultrasonic treatment at the frequency of 60kHz in the air introducing process, taking out the porous non-woven fabric fibers, and drying at the temperature of 55 ℃ to constant weight to obtain pretreated porous non-woven fabric fibers;
citric acid and 3% of antibacterial metal salt solution by mass percent are mixed according to the mass ratio of 1:10, mixing and dissolving to obtain a citric acid mixed solution, and then mixing the pretreated porous non-woven fabric fibers and the citric acid mixed solution according to the mass ratio of 10:1, after mixing, carrying out ultrasonic impregnation for 45min under the condition that the ultrasonic frequency is 90kHz, filtering, collecting a filter cake, and drying the obtained filter cake to constant weight under the condition that the temperature is 55 ℃ to obtain modified porous non-woven fabric fibers; the antibacterial metal salt is silver nitrate;
the obtained modified porous non-woven fabric fiber is subjected to a water jet technology to prepare a soft antibacterial non-woven fabric product.
Example 2
Preparation of porous non-woven fabric fibers:
according to parts by weight, sequentially taking 8 parts of nano calcium carbonate, 130 parts of polypropylene slices and thermoplastic elastomer TPE accounting for 4% of the mass of the polypropylene slices, adding the mixture into a mixer, stirring and mixing the mixture, pouring the mixture into a screw extruder for base, molding, and sieving the mixture to obtain a polypropylene composite material with the length of 3-5cm and the length-diameter ratio of 20:1-30: 1# nonwoven fiber of 300-500 μm in length and 10 in aspect ratio: 1-15: the method comprises the steps of 1, compounding 30 parts of 1# non-woven fabric fibers and 35 parts of 2# non-woven fabric fibers according to parts by weight to obtain blended fibers;
soaking the blended fiber in 4% hydrochloric acid solution by mass fraction, carrying out ultrasonic soaking for 70min under the condition of ultrasonic frequency of 80kHz, filtering, collecting a filter cake, washing the filter cake with deionized water for 4 times, transferring the washed filter cake into an oven, and drying to constant weight under the condition of 58 ℃ to obtain porous non-woven fabric fiber;
modifying porous non-woven fabric fiber:
soaking the porous non-woven fabric fiber in a dopamine solution with the concentration of 3g/L, regulating the pH value of the solution to 7.4, introducing air into the solution at the speed of 40mL/min for 15min, continuously carrying out ultrasonic treatment at the frequency of 80kHz in the air introducing process, taking out the porous non-woven fabric fiber, and drying at the temperature of 58 ℃ to constant weight to obtain the pretreated porous non-woven fabric fiber;
citric acid and 4% of antibacterial metal salt solution by mass percent are mixed according to the mass ratio of 1:12, mixing and dissolving to obtain a citric acid mixed solution, and then mixing the pretreated porous non-woven fabric fibers and the citric acid mixed solution according to the mass ratio of 15:1, after mixing, carrying out ultrasonic impregnation for 55min under the condition that the ultrasonic frequency is 100kHz, filtering, collecting a filter cake, and drying the obtained filter cake to constant weight under the condition that the temperature is 58 ℃ to obtain modified porous non-woven fabric fibers; the antibacterial metal salt is copper sulfate;
the obtained modified porous non-woven fabric fiber is subjected to a water jet technology to prepare a soft antibacterial non-woven fabric product.
Example 3
Preparation of porous non-woven fabric fibers:
according to the weight portion, sequentially taking 10 portions of nano calcium carbonate, 150 portions of polypropylene slices and thermoplastic elastomer TPE with the mass of 5% of the polypropylene slices, adding the mixture into a mixer, stirring and mixing the mixture, pouring the mixture into a screw extruder for base, molding, and sieving the mixture to obtain the thermoplastic elastomer TPE with the length of 3-5cm and the length-diameter ratio of 20:1-30: 1# nonwoven fiber of 300-500 μm in length and 10 in aspect ratio: 1-15:1, 40 parts of 1# non-woven fabric fibers and 40 parts of 2# non-woven fabric fibers are compounded according to parts by weight, so as to obtain blend fibers;
soaking the blended fiber in 5% hydrochloric acid solution by mass fraction, carrying out ultrasonic soaking for 80min under the condition of ultrasonic frequency of 90kHz, filtering, collecting a filter cake, washing the filter cake with deionized water for 5 times, transferring the washed filter cake into an oven, and drying to constant weight under the condition of 60 ℃ to obtain porous non-woven fabric fiber;
modifying porous non-woven fabric fiber:
soaking the porous non-woven fabric fibers in a dopamine solution with the concentration of 5g/L, regulating the pH value of the solution to 7.5, introducing air into the solution at the speed of 50mL/min for 20min, continuously carrying out ultrasonic treatment at the frequency of 90kHz in the air introducing process, taking out the porous non-woven fabric fibers, and drying at the temperature of 60 ℃ to constant weight to obtain pretreated porous non-woven fabric fibers;
citric acid and 5% of antibacterial metal salt solution by mass percent are mixed according to the mass ratio of 1:15, mixing and dissolving to obtain a citric acid mixed solution, and then mixing the pretreated porous non-woven fabric fibers and the citric acid mixed solution according to the mass ratio of 20:1, after mixing, carrying out ultrasonic impregnation for 60min under the condition that the ultrasonic frequency is 120kHz, filtering, collecting a filter cake, and drying the obtained filter cake to constant weight under the condition that the temperature is 60 ℃ to obtain modified porous non-woven fabric fibers; the antibacterial metal salt is copper nitrate;
the obtained modified porous non-woven fabric fiber is subjected to a water jet technology to prepare a soft antibacterial non-woven fabric product.
Example 4
The difference between this embodiment and embodiment 1 is that: the dopamine solution is replaced by deionized water with equal mass, and the rest conditions are kept unchanged.
Example 5
The difference between this embodiment and embodiment 1 is that: no thermoplastic elastomer was added and the remaining conditions remained unchanged.
Example 6
Preparation of porous non-woven fabric fibers:
according to the weight portion, sequentially taking 5 portions of nano calcium carbonate, 120 portions of polypropylene slices and thermoplastic elastomer TPE with the mass of 3% of the polypropylene slices, adding the mixture into a mixer, stirring and mixing the mixture, pouring the mixture into a screw extruder for base, molding, and sieving the mixture to obtain the thermoplastic elastomer TPE with the length distribution of 3-5cm and the length-diameter ratio distribution of 20:1-30:1 to obtain a blend fiber;
soaking the blended fiber in 3% hydrochloric acid solution by mass fraction, carrying out ultrasonic soaking for 60min under the condition of ultrasonic frequency of 60kHz, filtering, collecting a filter cake, washing the filter cake with deionized water for 3 times, transferring the washed filter cake into an oven, and drying to constant weight under the condition of 55 ℃ to obtain porous non-woven fabric fiber;
modifying porous non-woven fabric fiber:
soaking the porous non-woven fabric fibers in a dopamine solution with the concentration of 2g/L, regulating the pH value of the solution to 7.2, introducing air into the solution at the rate of 30mL/min for 10min, continuously carrying out ultrasonic treatment at the frequency of 60kHz in the air introducing process, taking out the porous non-woven fabric fibers, and drying at the temperature of 55 ℃ to constant weight to obtain pretreated porous non-woven fabric fibers;
citric acid and 3% of antibacterial metal salt solution by mass percent are mixed according to the mass ratio of 1:10, mixing and dissolving to obtain a citric acid mixed solution, and then mixing the pretreated porous non-woven fabric fibers and the citric acid mixed solution according to the mass ratio of 10:1, after mixing, carrying out ultrasonic impregnation for 45min under the condition that the ultrasonic frequency is 90kHz, filtering, collecting a filter cake, and drying the obtained filter cake to constant weight under the condition that the temperature is 55 ℃ to obtain modified porous non-woven fabric fibers; the antibacterial metal salt is silver nitrate;
the obtained modified porous non-woven fabric fiber is subjected to a water jet technology to prepare a soft antibacterial non-woven fabric product.
Comparative example 1
The difference between this comparative example and example 1 is that: EDTA with equal quality is used to replace citric acid, and the rest conditions are kept unchanged.
The products of examples 1-6 and comparative example 1 were subjected to performance testing, and specific test methods and test results are described below;
the concentration is 5.6X10 5 cfu/mL of bacteria (Table100mL of each suspension of Staphylococcus epidermidis AATCC35982 and Escherichia coli (final bacterial concentration 5.6X10) 4 cfu/mL), uniformly coating on the surface of a culture dish with the diameter of 200mm and containing nutrient agar, respectively taking sample pieces of the non-woven fabric products obtained in the above examples and comparative examples, selecting round sample pieces with the diameter of 6mm, placing the sample pieces on the surface of the culture dish, standing in a constant temperature incubator at 37 ℃, measuring the diameter of a bacteriostasis zone around the sample pieces by using a vernier caliper after culturing for 36h, and specifically testing the results shown in Table 1:
table 1: product performance test results
| Diameter of inhibition zone | |
| Example 1 | 15.6mm |
| Example 2 | 16.2mm |
| Example 3 | 15.9mm |
| Example 4 | 14.2mm |
| Example 5 | 13.8mm |
| Example 6 | 12.9mm |
| Comparative example 1 | 8.2mm |
The test results show that the scheme of the invention has good antibacterial effect and can effectively kill bacteria in the environment.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (5)
1. A soft antibacterial non-woven fabric is characterized by comprising non-woven fabric fibers, citric acid and antibacterial metal ions;
the antibacterial metal ions are chelated and adsorbed by citric acid;
the non-woven fabric fibers are porous non-woven fabric fibers, and the pores of the porous non-woven fabric fibers are of a through hole structure, so that the citric acid is distributed in the pores and can be in contact with the outside;
the non-woven fabric fibers comprise the following non-woven fabric fibers in parts by weight:
20-40 parts of the material with the length of 3-5cm and the length-diameter ratio of 20:1-30: 1# nonwoven fiber of 1;
30-40 parts of the material has a length of 300-500 mu m and an aspect ratio of 10:1-15: 1# 2 nonwoven fabric fiber;
and thermoplastic elastomer TPE with 3-5% of the fiber mass of the non-woven fabric.
2. The soft, antimicrobial nonwoven fabric of claim 1, wherein said antimicrobial metal ion is selected from at least one of silver ion, copper ion, or zinc ion.
3. The soft, antimicrobial nonwoven fabric of claim 1, wherein a polydopamine interlayer is filled between said pores and said citric acid.
4. The method for preparing a soft antibacterial nonwoven fabric according to claim 1, wherein the specific preparation steps comprise:
preparation of porous non-woven fabric fibers:
mixing nano calcium carbonate and polypropylene slices, and extruding in a screw extruder to obtain blended fibers; soaking the blended fiber in hydrochloric acid solution, carrying out ultrasonic soaking, filtering, washing and drying to obtain porous non-woven fabric fiber;
modifying porous non-woven fabric fiber:
soaking the porous non-woven fabric fibers in a dopamine solution, regulating the pH value of the solution to 7.2-7.5, introducing air into the solution, taking out the porous non-woven fabric fibers after ultrasonic soaking reaction, and drying to obtain pretreated porous non-woven fabric fibers;
mixing and dissolving citric acid and an antibacterial metal salt solution, adding pretreated porous non-woven fabric fibers, carrying out ultrasonic impregnation, filtering, and drying to obtain modified porous non-woven fabric fibers;
in the preparation process of the non-woven fabric fiber, when the nano calcium carbonate and the polypropylene slices are mixed, the thermoplastic elastomer TPE with the mass of 3-5% of the mass of the polypropylene slices is added.
5. The method for producing a soft antibacterial nonwoven fabric according to claim 4, wherein the antibacterial metal salt is at least one selected from the group consisting of silver nitrate, copper sulfate, copper chloride, copper nitrate, zinc sulfate, zinc chloride and zinc nitrate.
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